|Jmol-3D images||Image 1|
|Molar mass||88.11 g/mol|
|Density||0.9697 g/cm3 at 0 °C|
|Melting point||−47 °C; −53 °F; 226 K|
|Boiling point||155 °C; 311 °F; 428 K|
| (what is: / ?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Isobutyric acid may be artificially prepared by the hydrolysis of isobutyronitrile with alkalis, by the oxidation of isobutanol with potassium dichromate and sulfuric acid, or by the action of sodium amalgam on methacrylic acid. It is a liquid of somewhat unpleasant smell, boiling at 155 °C. Its specific gravity is 0.9697 (0 °C). Heated with chromic acid solution to 140 °C, it gives carbon dioxide and acetone. Alkaline potassium permanganate oxidizes it to α-hydroxyisobutyric acid, (CH3)2-C(OH)-COOH. Its salts are more soluble in water than those of butyric acid.
Isobutyric acid can also be manufactured commercially using engineered bacteria using a sugar feedstock.
Isobutyric acid is a retained trivial name under the IUPAC rules.
- Merck Index, 11th Edition, 5039
- Bjerrum, J., et al. Stability Constants, Chemical Society, London, 1958.
- I. Pierre and E. Puchot (1873). "New Studies on Valerianic Acid and its Preparation on a Large Scale". Ann. de chim. et de phys. 28: 366.
- "Biological pathways to produce methacrylate".
- Panico, R.; Powell, W. H.; Richer, J. C., eds. (1993). "Recommendation R-9.1". A Guide to IUPAC Nomenclature of Organic Compounds. IUPAC/Blackwell Science. ISBN 0-632-03488-2.